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Simplifying 15 = 2(n + -1) + 3 Reorder the terms: 15 = 2(-1 + n) + 3 15 = (-1 * 2 + n * 2) + 3 15 = (-2 + 2n) + 3 Reorder the terms: 15 = -2 + 3 + 2n Combine like terms: -2 + 3 = 1 15 = 1 + 2n Solving 15 = 1 + 2n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-2n' to each side of the equation. 15 + -2n = 1 + 2n + -2n Combine like terms: 2n + -2n = 0 15 + -2n = 1 + 0 15 + -2n = 1 Add '-15' to each side of the equation. 15 + -15 + -2n = 1 + -15 Combine like terms: 15 + -15 = 0 0 + -2n = 1 + -15 -2n = 1 + -15 Combine like terms: 1 + -15 = -14 -2n = -14 Divide each side by '-2'. n = 7 Simplifying n = 7
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